Ungraduated Gilson separatory funnels with ground cones, plastic stoppers, and PTFE key stopcocks, made of borosilicate 3.3 glass.

• Made of high quality, heavy-duty borosilicate 3.3 glass - can withstand high temperatures and thermal shocks
• Used to separate the components of a mixture into two immiscible liquids of different densities
• Gilson style features a long delivery stem for good control of the liquid/liquid interface
• Fitted with a PTFE key stopcock for precise drop-wise dispensing of the denser separated liquid
• With ground glass cone with and interchangeable plastic stopper
• Ungraduated

Gilson style Separating Funnels have a long delivery stem for good control of the liquid/liquid interface. They feature a ground cone, plastic stopper, and PTFE key stopcock. Autoclavable, with superior chemical durability. Low temperature gradient - can withstand high temperatures and thermal shocks.

Eisco Labs borosilicate glass has the following heat tolerances:
- Strain Point 515 °C
- Annealing Point 565 °C
- Softening Point 820 °C